This is a long shot but worth a try

I have an Agnes Whittle born 1815 Preston Lancashire.
I found the baptism of her son.
Baptism: 16 Jul 1843 St John, Preston, Lancashire
Richard Whittle - [Child] of Agnes Whittle
Abode: Workhouse
Baptised By: J O Parr Vicar
I noticed her address states workhouse I found an Agnes Whittle on the 1841 census living at Ribchester workhouse with two other children.
Agnes Whittle 25
Joseph aged 5
Peter aged 1
I am unsure if they are the same person, I have found Agnes and her son Richard on later census records but no Joseph or Peter so I am unsure if I am on the right track.
Any help would be appreciated.
Thanks